Eric Dane, the American actor best known for playing Dr Mark 'MCSteamy' Sloan on the long-running medical drama 'Grey's Anatomy', has checked into rehabilitation for an addition to painkillers, reports People Magazine. Dane has entered a rehabilitation centre in Los Angeles, according to his representative.Despite seeking treatment, Dane's spokesperson claims he will return to work on Grey's Anatomy next week, adding, "Eric Dane voluntarily checked himself into a treatment facility to help him get off of pain medication that he was prescribed for a sports injury that he suffered over the recent hiatus". The news comes just weeks after it was revealed the actor's wife Rebecca Gayheart was expecting the couple's second child - their daughter Billie is now 16 months old. The actor joins a long list of celebrities who have become addicted to painkillers, most notably reality star Jack Osbourne and award-winning actress Jamie Lee Curtis. No further details about the actor's stint in rehab have been released, and it is not clear which medical facility he is being treated at.In recent years, Eric Dane has branched out into Hollywood feature films, starring alongside Patrick Dempsey in the romantic-comedy 'Valentine's Day', and in the hugely successful 'Marley & Me', with Jennifer Aniston and OWEN WILSON.